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The Study of Energy Saving and Indoor Thermal Comfort in Air-conditioning System Using Heat Pipe

Author: ZhangJingLing
Tutor: WanJianWu
School: Guangzhou University
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: heat pipe air-conditioner a central air-conditioning system with primary return air energy saving equivalent thermal comfort
CLC: TU831.3
Type: Master's thesis
Year: 2007
Downloads: 319
Quote: 3
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Abstract


With the wide application of air conditioning equipments and the rapid increase of energyconsumption in air conditioning buildings, the situation of energy deficiency is very severe.Thus, reducing the energy consumption in air conditioning building by the use of newenergy-efficient technology and equipments is an urgent task for the research work.Employing heat pipe exchanger as air handing equipment in air conditioning system, thispaper investigates the energy consumption of a central air-conditioning system with primaryreturn air. The study shows that compared with conventional central air-conditioning systemwith primary return air, a central air-conditioning system with primary return air using heatpipe can decrease the peak cooling load, the capacity of refrigerator, and the energyconsumption of air conditioning system without increasing the operating energy consumptionof additional equipment and using the reheater causing energy loss occurred in cooling andreheating processes of air by means of the heat recovered from outside air to precool outsideor mixed air and to reheat supply air in air handing process. It has a great energy savingpotential.Furthermore, this paper presents the effect of indoor design temperature and relativehumidity on thermal comfort and energy consumption. The study shows that under the sameindoor thermal comfort condition, a conventional central air-conditioning system can notdecrease energy consumption just through increasing indoor temperature in summer. Thisdisadvantage can be improved by heat pipe air-conditioning system, in which indoor thermalcomfort can be obtained through decreasing indoor relative humidity by reheating supply airwhen indoor design temperature is elevated for energy saving. Besides, the equivalentcomfort equations under different working conditiond are introduced by curve fitting method.

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CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Air-conditioning > Air-conditioning systems
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